Permade/w.i.p maps are allowed, but they don't have to be finished 100%. I'm just looking to get some new interesting layouts played and seen by the urt public.

Does that mean mappers would be able to update their submissions until the deadline is reached?

EDIT: I currently have a map sitting around using the basic three-lane scheme with a twist: two middles lanes/connectors stacked on top of each other (the green and blue one on the very simplified layout below).
Note there is no direct line of sight between the two; players need to get around using the red/orange pathways to go from one middle to the other.
Didn't go very far into this because I'm lacking time and playtesters, so I'm not sure how it actually plays, but I suppose it somewhat fits the 'verticality with different height layers/routes' theme? I might post some actual screenshots, provided greyboxed maps are allowed